Automatic compensating valves for individual showers and tub/shower combinations are intended to control the water temperature to wall mounted shower heads either in individual shower or tub/shower combination fixtures to reduce the risk of scalding and thermal shock. They are installed at the point-of-use, where the bather has access to flow and final temperature control mechanisms, and where the water temperature cannot be adjusted downstream of the device.
ANSI/ASSE 1016-2005 history
2005ANSI/ASSE 1016-2005 Performance Requirements for Automatic Compensating Valves for Individual Showers and Showers in Tub/Shower Combinations